CN202975087U - Power supply circuit module for intelligent electric meter - Google Patents
Power supply circuit module for intelligent electric meter Download PDFInfo
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- CN202975087U CN202975087U CN 201220656454 CN201220656454U CN202975087U CN 202975087 U CN202975087 U CN 202975087U CN 201220656454 CN201220656454 CN 201220656454 CN 201220656454 U CN201220656454 U CN 201220656454U CN 202975087 U CN202975087 U CN 202975087U
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Abstract
The utility model discloses a power supply circuit module for an intelligent electric meter. The power supply circuit module comprises a circuit board (1) and three pins connected with the circuit board (1), wherein the three pins are an input pin (2), a ground pin (3) and an output pin (4) successively, the circuit board (1) is provided with a DC-to-DC power supply circuit, an input terminal of the DC-to-DC power supply circuit is connected with the input pin (2), a ground terminal of the DC-to-DC power supply circuit is connected with the ground pin (3), and an output terminal of the DC-to-DC power supply circuit is connected with the output pin (4) is connected. With such a structure, the utility model has the following advantages: 1, when the DC-to-DC power supply circuit breaks over and a large current flows through the circuit, a change-over switch has stable voltage and low voltage drop, electrical equipment has small electrical energy loss and high efficiency; and 2, setting of the pins of the power supply circuit module is identical to setting of pins of a conventional linear power supply circuit module, so the power supply circuit module is compatible and reduces changes of procedures.
Description
Technical field
The utility model relates to the ammeter field, relates in particular to a kind of power circuit module for intelligent electric meter.
Background technology
Because intelligent electric meter can not only provide the power information of transparence and real time implementation the while to Utilities Electric Co. and consumer, and the operation that can also help to coordinate consumer reduces energy consumption, just fast development since listing according to one's analysis also can be with the quantity growth of annual 5000 ten thousand within the coming years.
Although the power supply of every intelligent electric meter consumption when operation is fewer, it is a huge electric weight that the power consumption of the intelligent electric meter of flood tide like this is added up.Therefore, the energy consumption that how to reduce intelligent electric meter is one of development project of nearly stage focus.
Intelligent electric meter mainly comprises single-chip microcomputer, electronic devices and components and power circuit, and wherein power circuit provides power for whole intelligent electric meter system, is one of core technology of intelligent electric meter, and the design of power circuit directly has influence on the energy consumption of intelligent electric meter.
Existing linear power supply circuit module for intelligent electric meter as shown in Figure 1, comprise template 101 and be connected to three pins on template 101, three pins are respectively input pin 102, grounding pin 103 and output pin 104, be provided with the linear power supply circuit on template, this linear power supply circuit as shown in Figure 2, its switching tube is operated in the line style amplification region, when large electric current, the pressure drop of switch state is large, causes the electric energy loss of electrical equipment larger, and overall efficiency is low.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of high efficiency, the power circuit module that is used for intelligent electric meter low in energy consumption.
the utility model solves the problems of the technologies described above the technical scheme that adopts: a kind of power circuit module for intelligent electric meter, it comprises wiring board and three pins that are connected in the circuit board, described three pins are respectively input pin, grounding pin and output pin, be provided with the DC-DC power supply circuit on described wiring board, the input end of described DC-DC power supply circuit is connected with described input pin, the earth terminal of described DC-DC power supply circuit is connected with described grounding pin, the output terminal of described DC-DC power supply circuit is connected with described output pin.
After adopting said structure, the utility model advantage compared to existing technology is: one, the DC-DC power supply circuit is when large electric current is flow through in conducting, and the pressure drop of switch voltage stabilization is little, and the electric energy loss of electrical equipment is little, and efficient is high; Two, the pin setting of this power circuit module and the pin of original linear power supply circuit module arrange the same, can be compatible, reduce process variations.
As preferably, described DC-DC power supply circuit comprises DC-DC power supply chip, inductance, fly-wheel diode, the first electric capacity, the second electric capacity, the 3rd electric capacity, the first resistance, the second resistance and the 3rd resistance; Described input pin respectively with an end of the input pin of DC-DC power supply chip, the first resistance be connected the positive pole of electric capacity and be connected, the switch pin of described DC-DC power supply chip is connected an end with the negative electrode of an end of the second electric capacity, fly-wheel diode respectively and is connected with inductance, the other end of inductance is connected with output pin with an end of the 3rd electric capacity, an end of the second resistance respectively; The other end of described the first resistance is connected with the shutoff pin of DC-DC power supply chip; The other end of described the second resistance is connected with the feedback pin of DC-DC power supply chip and an end of the 3rd resistance respectively; One end of described the second electric capacity is connected with the bootstrap capacitor pin of described DC-DC power supply chip; The other end of the negative pole of the ground pin of described DC-DC power supply chip, the anode of fly-wheel diode, the first electric capacity, an end of the 3rd electric capacity and the 3rd resistance is connected with grounding pin respectively.This DC-DC power supply circuit does not almost have current flowing when turn-offing, electric energy loss is little.
As preferably, described DC-DC power supply chip adopts MP2451.When underloading, make this power circuit that is used for intelligent electric meter enter frequency-hopping mode, reduce equivalent switching frequency, reduced switching loss.
As preferably, the magnetic field intensity of described inductance is 15 μ H.The intelligent electric meter that this preferred power circuit is used for the ordinary family user is more suitable.
As preferably, described fly-wheel diode adopts schottky diode.The good pressure-resistant performance of this diode is not easy to damage.
Description of drawings
Fig. 1 is the encapsulation figure (prior art does not describe in detail in an embodiment) that is used for the linear power supply circuit module of intelligent electric meter.
Fig. 2 is the circuit diagram (prior art does not describe in detail in an embodiment) that is used for the linear power supply circuit of intelligent electric meter.
Fig. 3 is structural representation of the present utility model.
Fig. 4 is circuit diagram of the present utility model.
Fig. 5 is circuit theory diagrams of the present utility model.
As shown in the figure: 1, wiring board, 2, input pin, 3, grounding pin, 4, output pin.
Embodiment
Embodiment is described in further detail the utility model below in conjunction with accompanying drawing.
As shown in Figure 3 and Figure 4, a kind of power circuit module for intelligent electric meter, it comprises wiring board 1 and three pins that are connected on wiring board 1, three pins are arranged in order and are input pin 2, grounding pin 3 and output pin 4, be provided with the DC-DC power supply circuit on wiring board 1, the input end IN of DC-DC power supply circuit is connected with input pin 2, the earth terminal of DC-DC power supply circuit is connected with grounding pin 3, and the output terminal OUT of DC-DC power supply circuit is connected with output pin 4.
In the present embodiment, the DC-DC power supply circuit comprises DC-DC power supply chip (Direct Current To Direct Current, DCDC), inductance L 1, sustained diode 1, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the first resistance R 1, the second resistance R 2 and the 3rd resistance R 3; Input pin 2 respectively with an end of the input pin VIN of DC-DC power supply chip DCDC, the first resistance R 1 be connected the positive pole of capacitor C 1 and be connected, the switch terminals SW of DC-DC power supply chip DCDC is connected with an end of the second capacitor C 2, the end that the negative electrode of sustained diode 1 is connected with inductance L respectively, and the other end of inductance L 1 is connected with output pin with an end of an end of the 3rd capacitor C 3, the second resistance R 2 respectively and is connected; The other end of the first resistance R 1 is connected with the shutoff pin SHDN of DC-DC power supply chip DCDC; The other end of the second resistance R 2 is connected with the feedback pin FB of DC-DC power supply chip DCDC and an end of the 3rd resistance R 3 respectively; One end of the second capacitor C 2 is connected with the bootstrap capacitor pin CB of DC-DC power supply chip DCDC; The other end of the negative pole of the ground pin GND of DC-DC power supply chip DCDC, the anode of sustained diode 1, the first capacitor C 1, an end of the 3rd capacitor C 3 and the 3rd resistance R 3 is connected with grounding pin 3 respectively.
As preferably, DC-DC power supply chip DCDC adopts MP2451.
As preferably, the magnetic field intensity of inductance L 1 is 15 μ H.
As preferably, sustained diode 1 adopts schottky diode.
This power circuit is a kind of voltage regulation performance novel power supply preferably, the circuit diagram of specific works principle as shown in Figure 5, when K switch is closed, power supply is by K switch, inductance L 11 powering loads, and with the part electrical power storage in inductance L 11 and capacitor C 11, due to the self-induction of inductance L 11, after K switch is connected, electric current increases slowlyer, i.e. output can not reach supply voltage value at once.After certain hour, switch disconnects, and is due to the self-induction action of inductance L 11, that the electric current in holding circuit is constant, namely continues from left to right stream.Electric current flows through load, returns from ground wire, flows to the positive pole of fly-wheel diode VD11, through diode VD11, returns to the left end of inductance L 11, thereby has formed a loop.Therefore, just can control output voltage by the closed time with disconnection of gauge tap K.Output voltage is as required adjusted time of K switch open and close, to keep output voltage constant, just can realize the purpose of voltage stabilizing.
Claims (5)
1. power circuit module that is used for intelligent electric meter, it comprises wiring board (1) and is connected to three pins on wiring board (1), described three pins are arranged in order and are input pin (2), grounding pin (3) and output pin (4), it is characterized in that: described wiring board is provided with the DC-DC power supply circuit on (1), the input end of described DC-DC power supply circuit is connected with input pin (2), the earth terminal of described DC-DC power supply circuit is connected with grounding pin (3), the output terminal of described DC-DC power supply circuit is connected with output pin (4).
2. the power circuit module for intelligent electric meter according to claim 1, it is characterized in that: described DC-DC power supply circuit comprises DC-DC power supply chip (DCDC), inductance (L1), fly-wheel diode (D1), the first electric capacity (C1), the second electric capacity (C2), the 3rd electric capacity (C3), the first resistance (R1), the second resistance (R2) and the 3rd resistance (R3);
described input pin (2) respectively with the input pin (VIN) of DC-DC power supply chip (DCDC), one end of the first resistance (R1) be connected the positive pole of electric capacity (C1) and connect, the open pipe pin (SW) of described DC-DC power supply chip (DCDC) respectively with an end of the second electric capacity (C2), the negative electrode of fly-wheel diode (D1) is connected L1 with inductance) an end connect, the other end of inductance (L1) respectively with an end of the 3rd electric capacity (C3), one end of the second resistance (R2) is connected 4 with output pin) connect,
The other end of described the first resistance (R1) is connected with the shutoff pin (SHDN) of DC-DC power supply chip (DCDC);
The other end of described the second resistance (R2) is connected with the feedback pin (FB) of DC-DC power supply chip (DCDC) and an end of the 3rd resistance (R3) respectively;
One end of described the second electric capacity (C2) is connected with the bootstrap capacitor pin (CB) of described DC-DC power supply chip (DCDC);
The other end of the negative pole of the ground pin (GND) of described DC-DC power supply chip (DCDC), the anode of fly-wheel diode (D1), the first electric capacity (C1), an end of the 3rd electric capacity (C3) and the 3rd resistance (R3) is connected with grounding pin (3) respectively.
3. the power circuit for intelligent electric meter according to claim 2, is characterized in that: described DC-DC power supply chip (DCDC) employing MP2451.
4. the power circuit for intelligent electric meter according to claim 2, it is characterized in that: the magnetic field intensity of described inductance (L1) is 15 μ H.
5. the described power circuit for intelligent electric meter of according to claim 2 ~ 4 any one, is characterized in that: described fly-wheel diode (D1) employing schottky diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220656454 CN202975087U (en) | 2012-11-20 | 2012-11-20 | Power supply circuit module for intelligent electric meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220656454 CN202975087U (en) | 2012-11-20 | 2012-11-20 | Power supply circuit module for intelligent electric meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202975087U true CN202975087U (en) | 2013-06-05 |
Family
ID=48516145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220656454 Expired - Lifetime CN202975087U (en) | 2012-11-20 | 2012-11-20 | Power supply circuit module for intelligent electric meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202975087U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784026A (en) * | 2016-05-07 | 2016-07-20 | 张舒维 | Novel intelligent instrument convenient to install |
| CN111337871A (en) * | 2020-02-29 | 2020-06-26 | 贵州电网有限责任公司 | Electric energy meter and terminal communication module IO port level adjustable circuit |
-
2012
- 2012-11-20 CN CN 201220656454 patent/CN202975087U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784026A (en) * | 2016-05-07 | 2016-07-20 | 张舒维 | Novel intelligent instrument convenient to install |
| CN111337871A (en) * | 2020-02-29 | 2020-06-26 | 贵州电网有限责任公司 | Electric energy meter and terminal communication module IO port level adjustable circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: NINGBO SANXING INTELLIGENT ELECTRIC CO., LTD. Free format text: FORMER NAME: NINGBO XINSHANG INTELLIGENT ELECTRIC CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 315034 Ningbo, Jiangbei District, Zhejiang City, the town of Maple Bay Road, No. 16 Patentee after: Ningbo Sanxing Smart Electric Co.,Ltd. Address before: 315200, Ningbo, Jiangbei District, Zhejiang province Miao City wonderful mountain thoroughbred field Patentee before: Ningbo Xinshang Intelligent Electrical Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130605 |